Xeon W 1390P 's Advantages
Higher base frequency (3.5GHz vs 1.8GHz)
Lower TDP (125W vs 225W)
Xeon 6756E 's Advantages
Released 3 years and 1 months late
Higher specification of memory (6400 vs 3200)
Newer PCIe version (5 vs 4)
Larger L3 cache size (96MB vs 16MB)
More modern manufacturing process (5nm vs 14nm)